diff --git a/gclc/src/main/java/net/bigeon/gclc/command/Command.java b/gclc/src/main/java/net/bigeon/gclc/command/Command.java
index a1652a6..f16eedf 100644
--- a/gclc/src/main/java/net/bigeon/gclc/command/Command.java
+++ b/gclc/src/main/java/net/bigeon/gclc/command/Command.java
@@ -73,7 +73,7 @@ public abstract class Command implements ICommand {
     /** Create the command.
      *
      * @param name the command name */
-    public Command(final String name) {
+    protected Command(final String name) {
         super();
         if (name == null) {
             throw new IllegalArgumentException("The command name is mandatory");
diff --git a/gclc/src/main/java/net/bigeon/gclc/command/ParametrizedCommand.java b/gclc/src/main/java/net/bigeon/gclc/command/ParametrizedCommand.java
index d354c46..0397a4f 100644
--- a/gclc/src/main/java/net/bigeon/gclc/command/ParametrizedCommand.java
+++ b/gclc/src/main/java/net/bigeon/gclc/command/ParametrizedCommand.java
@@ -94,7 +94,7 @@ public abstract class ParametrizedCommand extends Command {
      * parameters.
      *
      * @param name the name */
-    public ParametrizedCommand(final String name) {
+    protected ParametrizedCommand(final String name) {
         this(name, true);
     }
 
@@ -106,7 +106,7 @@ public abstract class ParametrizedCommand extends Command {
      *
      * @param name the name
      * @param strict if the arguments are restricted to the declared ones */
-    public ParametrizedCommand(final String name, final boolean strict) {
+    protected ParametrizedCommand(final String name, final boolean strict) {
         super(name);
         data = new ParametrizedCommandData(strict);
     }
diff --git a/gclc/src/main/java/net/bigeon/gclc/tools/AOutputForwardRunnable.java b/gclc/src/main/java/net/bigeon/gclc/tools/AOutputForwardRunnable.java
index e32ed38..0f5c89c 100644
--- a/gclc/src/main/java/net/bigeon/gclc/tools/AOutputForwardRunnable.java
+++ b/gclc/src/main/java/net/bigeon/gclc/tools/AOutputForwardRunnable.java
@@ -97,7 +97,7 @@ public abstract class AOutputForwardRunnable implements Runnable {
     /** Create a forwarding runnable.
      *
      * @param manager the manager */
-    public AOutputForwardRunnable(final PipedConsoleOutput manager) {
+    protected AOutputForwardRunnable(final PipedConsoleOutput manager) {
         super();
         this.manager = manager;
         timeout = DEFAULT_TIMEOUT;
@@ -116,7 +116,8 @@ public abstract class AOutputForwardRunnable implements Runnable {
      *
      * @param manager the manager
      * @param timeout the timeout between message requests. */
-    public AOutputForwardRunnable(final PipedConsoleOutput manager, final long timeout) {
+    protected AOutputForwardRunnable(final PipedConsoleOutput manager,
+                                     final long timeout) {
         super();
         this.manager = manager;
         this.timeout = timeout;